Adapt ChangeLog
diff --git a/ChangeLog b/ChangeLog
index ded60d3..cef0e72 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,13 @@
= mbed TLS x.x.x branch released xxxx-xx-xx
+Security
+ * Make mbedtls_mpi_read_binary constant-time with respect to
+ the input data. Previously, trailing zero bytes were detected
+ and omitted for the sake of saving memory, but potentially
+ leading to slight timing differences.
+ Reported by Marco Macchetti, Kudelski Group.
+
Features
* Allow comments in test data files.